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<h2 align="center">Jim's Page</h2>
</font>
<font face="Verdana">
<h4 align="center">&nbsp;</h4>
</font><b><font face="Helvetica,Arial" size="6">
<p align="center">Chess IQ Test</p>
</font></b><font face="Courier New">
<p align="center">Compiled by Jim Monaghan</p>
</font>
<p align="center">&nbsp;</p>
<p>&nbsp;<a href="NewIQ.zip">Download the IQ Test</a></p>
<p>&nbsp;</p>
<b><font face="Helvetica,Arial"></font></b>
<p><b><font face="Helvetica,Arial">I. Tactical IQ Test for Chess
Programs</font></b></p>
<p>
<font face="Helvetica,Arial">This is a test suite from the master
section of Livshits' book "Test Your
Chess IQ". There are 360 positions that are carefully balanced with
medium
to hard examples.
</font></p>
<p>
<font face="Helvetica,Arial">The test as presented here is intended to
estimate the tactical strength of
chess engines. The test duration is one hour. Run the test on a chess
engine
at 10 seconds per position, note the percentage score achieved and
compare
it with the table below:
</font></p>
<b><font face="Courier New"></font></b>
<p><b><font face="Courier New">Percent &nbsp; IQ Elo &nbsp; Correct<br>
Correct &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; Solutions</font></b></p>
<p><font face="Courier New">&nbsp; 100&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
2764&nbsp; &nbsp;&nbsp;&nbsp; 360<br>
&nbsp;&nbsp; 90&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 2644 &nbsp; &nbsp;&nbsp;
324<br>
&nbsp; &nbsp;80&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 2524&nbsp; &nbsp; &nbsp;
288<br>
&nbsp;&nbsp; 70&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 2404&nbsp;&nbsp;
&nbsp;&nbsp; 252<br>
&nbsp;&nbsp; 60&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 2284&nbsp;&nbsp;&nbsp;
&nbsp; 216<br>
&nbsp; &nbsp;50&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 2164&nbsp;
&nbsp;&nbsp;&nbsp; 180<br>
&nbsp;&nbsp; 40&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 2044 &nbsp; &nbsp;&nbsp;
144<br>
&nbsp;&nbsp; 30&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 1924&nbsp; &nbsp; &nbsp;
108<br>
&nbsp; &nbsp;20&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 1804&nbsp;&nbsp; &nbsp;
&nbsp; 72<br>
&nbsp;&nbsp; 10&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 1684&nbsp;&nbsp;&nbsp;
&nbsp;&nbsp; 36<br>
&nbsp;&nbsp; &nbsp;0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
1564&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp; 0</font></p>
<font face="Helvetica,Arial">
</font>
<p><font face="Helvetica,Arial">The floor for the test is 1564, the
ceiling is 2764. Note that each percentage
point correct earns 12 "IQ Elo" points. So the rating formula is:
</font></p>
<p></p>
<div align="center">
<p></p>
<b><font face="Courier New">
</font></b>
<p><b><font face="Courier New"> IQ elo = 1564 + (% correct x 12)</font></b></p>
<p></p>
</div>
<p></p>
<font face="Helvetica,Arial">
<p>The test generates a tactical IQ rating for an engine on whatever
hardware
it is tested on. Strategical factors, and endgame knowledge are not
considered
in the test and are in no way measured. The ratings don't compare to
"real"
rating lists. It's just for fun, not too serious.
</p>
<b>
<p>II. Comparison of Ply Depth verses Rating Performance</p>
</b>
<p>Working with average ply depth instead of time, makes the table
below more
universally applicable to different programs and hardware. Again there
is
nothing absolute about the rating numbers -- it's the differences that
are
important. By pumping the new IQ test suite through Yace 0.99.56 at
ascending
ply depths I came up with the following table:
</p>
</font><b><font face="Courier New"></font></b>
<p><b><font face="Courier New">Cel 1.3 Ghz/256 (32 MB HT) </font></b></p>
<p><b><font face="Courier New">Avg Depth &nbsp; Found &nbsp; &nbsp;
&nbsp; &nbsp;Percent &nbsp; &nbsp;&nbsp; &nbsp; IQ Elo &nbsp;
&nbsp;&nbsp; Rating Gain<br>
</font></b><font face="Courier New">(Plys)&nbsp;&nbsp;&nbsp; (Total=360)<b>&nbsp;&nbsp;
&nbsp;Correct</b>&nbsp; &nbsp; &nbsp; (Max=2764) &nbsp; (Difference)</font></p>
<p><font face="Courier New">&nbsp;5&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
159&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 44.17%
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
2094&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; ---<br>
&nbsp;6&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
206&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 57.22%
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
2251&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 157<br>
&nbsp;7&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
241&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 66.94%
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
2367&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 116<br>
&nbsp;8&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
271&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 75.28%
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
2467&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 100<br>
&nbsp;9&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
288&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 80.00%
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
2524&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 57<br>
10&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
308&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 85.56%
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
2591&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 67<br>
11&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
315&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 87.50%
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
2614&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 23</font></p>
<font face="Helvetica,Arial">
</font>
<p><font face="Helvetica,Arial">Notice in the Ply Depth table above
that Yace solved 315/360 at 11 ply. Even
after 15 minutes and how many ply, a ceiling is definitely reached.
Some unique
type of pruning extensions will be needed to pierce this barrier or a
lot of
speed.
</font></p>
<p>
<font face="Helvetica,Arial">The tree really explodes at 12 ply on a
lot of these positions and would take a
huge amount of time. I would expect very little gain in performance
anyway.
</font></p>
<p>
<font face="Helvetica,Arial">Knowing (or assuming) that the
relationship between ply depth and rating
performance is a logarithmic function, I wonder if a mathematician can
extrapolate this table working with columns 1 and 5. Hopefully there is
enough
of a trend. The rating gain going from ply 8 to ply 9 is either a
little low at
57, or the gain from ply 9 to ply 10 is a little high at 67, or both.
The chart
could perhaps step a little better, but I'm reporting it as directly as
it came
out. Maybe the table can be smoothed out for projection purposes. What
would the
expected gain be going from ply 11 to 12, ply 12 to ply 13, etc? Is
there a
ceiling? In a theoretical sense, I guess there isn't a ceiling -- but
practically when you consider time spent to achieve higher plys, there
might as
well be. Interesting...
</font></p>
<p><font face="Helvetica,Arial">&nbsp;</font></p>
<font face="Helvetica,Arial"><b></b></font>
<p><font face="Helvetica,Arial"><b>III. Real Tough IQ</b><br>
&nbsp;<br>
The following 16 positions are unsolved by Yace 0.99.75c after one hour
per
position on a P4 2.53:<br>
&nbsp;<br>
</font><font face="Courier New">
6k1/1p3r1p/r2q1Pp1/2p1n1P1/p1PpP3/P2P2Q1/1P4B1/4RRK1 w - - bm Rf5; id
"IQ.1023";<br>
5rk1/p1q1ppb1/3p2p1/3P1bBp/1pr4P/5PN1/PPPQ2P1/1KR4R b - - bm Bc3; id
"IQ.1027";<br>
2rq1rk1/pp1bnpbp/4p1p1/3pP1N1/3P2Q1/2PB4/P4PPP/R1B1R1K1 w - - bm Nxh7;
id "IQ.1031";<br>
r3qrk1/1b3p2/1p1npnp1/2b1N1N1/p1P5/P1B5/1PB1QP1P/R2R2K1 w - - bm Nd7;
id "IQ.1057";<br>
r3k2r/2pn1pp1/p1p2qb1/Np2P1b1/6P1/3P2B1/PPP2P2/RN1Q1RK1 b kq - bm Nxe5;
id "IQ.1111";<br>
r2r4/pp3p2/4bkpp/8/7P/3B1P2/PP4P1/1K1R3R b - - bm Rxd3; id "IQ.1149";<br>
1rb1r1k1/3n1ppp/p1p1p3/q3P3/7P/2N1Q1R1/PPP3P1/2KR1B2 w - - bm Rxd7; id
"IQ.1182";<br>
r2qnrk1/pp2ppb1/3p3B/2p5/7Q/1PNP3b/1PP3PP/R4RK1 w - - bm Ne4; id
"IQ.1191";<br>
r2r2k1/pp3ppp/2p1bn2/7q/NbP3P1/1P2B2P/PQ3PB1/R4RK1 b - - bm Bxg4; id
"IQ.1194";<br>
r1b2rk1/2q1bppp/p2pp3/2n3PQ/1p1BP3/1BN5/PPP2P1P/2KR2R1 w - - bm Bf6; id
"IQ.1198";<br>
2rq1rk1/1b3pb1/5np1/1pn1p1Np/4P2Q/2N1B3/BPP3PP/R4R1K w - - bm Nxf7; id
"IQ.1226";<br>
r4rk1/1bpq1ppp/3p1b2/2nP1N2/8/1p3Q1P/PPB2PP1/R1B1R1K1 w - - bm Nxg7; id
"IQ.1248";<br>
rnb3kr/1p1nqppp/p3p3/2ppP3/3P1N2/2NB1Q2/PPP2PP1/R3K2R w KQ - bm Bxh7+;
id "IQ.1253";<br>
2kr3r/pp1b1p2/1qn1pb2/2p5/4Q3/5N1B/PPP2PPP/R1B2RK1 b - - bm Rxh3; id
"IQ.1259";<br>
2r2rk1/p1n3pp/1p2p3/1q1pQP2/3Pn3/6N1/PP4PP/R1B2RK1 w - - bm Bh6; id
"IQ.1270";<br>
r2q1rk1/3nbpp1/4p2p/p1p1P3/1p1P3P/3B1b1R/PPQB1PP1/R3K3 w - - bm Bxh6;
id "IQ.1274";<br>
</font>&nbsp;<br>
<font face="Helvetica,Arial">
I need to analyse these positions more to see if Yace is "seeing"
something that
the solutions have missed.</font></p>
<b><font face="Courier New"></font></b>
<p><b><font face="Courier New"><br>
</font><font face="Helvetica,Arial">IV. "Rating List"</font></b></p>
<p>
<font face="Helvetica,Arial">George Lyapko ran the old IQ test on his
AMD K6-2/450 for most of the free
Winboard programs back in Nov. 2001 using 10 sec/move, no opening book,
and no
EGTB's.
</font></p>
<b><font face="Courier New"></font></b>
<p><b><font face="Courier New">Program&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
&nbsp; Score &nbsp;% IQ Elo</font></b><font face="Courier New"><br>
Yace_09956&nbsp;&nbsp;&nbsp; &nbsp; &nbsp; 247 &nbsp;69 &nbsp;2387<br>
Phalanx_XXII &nbsp; &nbsp;&nbsp; 245 &nbsp;68 &nbsp;2381<br>
LG2000_30 &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp; 241 &nbsp;67 &nbsp;2367<br>
TCB_0045 &nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 228 &nbsp;63
&nbsp;2324<br>
Bringer_18&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp; 226 &nbsp;63 &nbsp;2317<br>
Gromit_300&nbsp;&nbsp; &nbsp;&nbsp; &nbsp; 225 &nbsp;63 &nbsp;2314<br>
Crafty_1812 &nbsp; &nbsp;&nbsp;&nbsp; 222 &nbsp;62 &nbsp;2304<br>
Pepito_142&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp; 222 &nbsp;62 &nbsp;2304<br>
Bionic_401&nbsp;&nbsp;&nbsp; &nbsp; &nbsp; 221 &nbsp;61 &nbsp;2301<br>
Nejmet_260&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; 221 &nbsp;61 &nbsp;2301<br>
Zchess_222 &nbsp; &nbsp;&nbsp;&nbsp;&nbsp; 219 &nbsp;61 &nbsp;2294<br>
Glc_215c &nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 219 &nbsp;61
&nbsp;2294<br>
Pharaon_250&nbsp;&nbsp;&nbsp; &nbsp;&nbsp; 217 &nbsp;60 &nbsp;2287<br>
Anmon_515&nbsp;&nbsp;&nbsp; &nbsp;&nbsp; &nbsp; 216 &nbsp;60 &nbsp;2284<br>
Inmi_305&nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp; 215 &nbsp;60
&nbsp;2281<br>
Tao_44&nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 214
&nbsp;59 &nbsp;2277<br>
Amy_07c &nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 213 &nbsp;59
&nbsp;2274<br>
WildCat_261&nbsp;&nbsp;&nbsp; &nbsp;&nbsp; 210 &nbsp;58 &nbsp;2264<br>
Comet_b37&nbsp;&nbsp;&nbsp; &nbsp;&nbsp; &nbsp; 209 &nbsp;58 &nbsp;2261<br>
Exchess_402 &nbsp; &nbsp;&nbsp;&nbsp; 209 &nbsp;58 &nbsp;2261<br>
KingOfKings_200 &nbsp; 205 &nbsp;57 &nbsp;2247<br>
Bestia_083&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; 204 &nbsp;57 &nbsp;2244<br>
Terra_25&nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp; 204 &nbsp;57
&nbsp;2244<br>
Knightx_171a&nbsp;&nbsp; &nbsp;&nbsp; 201 &nbsp;56 &nbsp;2234<br>
Ant_606&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp; &nbsp; 196 &nbsp;54
&nbsp;2217<br>
Arasan_54&nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp; 195 &nbsp;54 &nbsp;2214<br>
Quark_150 &nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 193 &nbsp;54 &nbsp;2207<br>
Gnuchess_414&nbsp; &nbsp; &nbsp; 192 &nbsp;53 &nbsp;2204<br>
Fortress_162 &nbsp; &nbsp;&nbsp; 190 &nbsp;53 &nbsp;2197<br>
Beowulf_17&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp; 189 &nbsp;53 &nbsp;2194<br>
LordKing_III &nbsp;&nbsp; &nbsp; 187 &nbsp;52 &nbsp;2187<br>
Dragon_42&nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp; 187 &nbsp;52 &nbsp;2187<br>
Freyr_1067&nbsp;&nbsp;&nbsp; &nbsp; &nbsp; 184 &nbsp;51 &nbsp;2177<br>
Queen_211&nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; 179 &nbsp;50 &nbsp;2161<br>
Sjeng_11&nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp; 178 &nbsp;49
&nbsp;2157<br>
Ssechess_2045&nbsp; &nbsp;&nbsp; 178 &nbsp;49 &nbsp;2157<br>
Gerbil_02&nbsp;&nbsp;&nbsp; &nbsp;&nbsp; &nbsp; 175 &nbsp;49 &nbsp;2147<br>
Amyan_148&nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp; 162 &nbsp;45 &nbsp;2104<br>
Esc_104&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 161
&nbsp;45 &nbsp;2101<br>
Olithink_305&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 156 &nbsp;43 &nbsp;2084<br>
Tristram_416&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 154 &nbsp;43 &nbsp;2077<br>
Ghost_v0_13&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 150 &nbsp;42 &nbsp;2064<br>
Gully2_c&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 148
&nbsp;41 &nbsp;2057<br>
Grizzly_125&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 137 &nbsp;38 &nbsp;2021<br>
Monik_211&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 135 &nbsp;38
&nbsp;2014<br>
Rzeznik_14&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 130 &nbsp;36
&nbsp;1997<br>
EnginMax_287&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 129 &nbsp;36 &nbsp;1994<br>
Ufim_143&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 128
&nbsp;36 &nbsp;1991<br>
Holmes_050Beta&nbsp;&nbsp;&nbsp; 128 &nbsp;36 &nbsp;1991<br>
Mint_23&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 119
&nbsp;33 &nbsp;1961<br>
Chessterfield_i5a 112 &nbsp;31 &nbsp;1937<br>
Aldebaran_070 &nbsp; &nbsp; 103 &nbsp;29 &nbsp;1907<br>
StAndersen_12 &nbsp; &nbsp; &nbsp;81 &nbsp;23 &nbsp;1834<br>
Skaki_119c &nbsp; &nbsp; &nbsp; &nbsp; 81 &nbsp;23 &nbsp;1834<br>
Storm_06 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 66 &nbsp;18 &nbsp;1784<br>
Ozwald_043 &nbsp; &nbsp; &nbsp; &nbsp; 53 &nbsp;15 &nbsp;1741<br>
<br>
</font><font face="Helvetica,Arial">And two results on an ancient
Am5x86-P75-S/133:<br>
</font><font face="Courier New"><br>
Yace_09956 &nbsp; &nbsp; &nbsp; &nbsp;147 41 2054<br>
Bestia_083 &nbsp; &nbsp; &nbsp; &nbsp;139 39 2027</font></p>
<font face="Helvetica,Arial">
<p>Although not perfect, IQ seems to be a moderately good predictor of
playing
strength.
</p>
<b>
<p><br>
V. Debug Notes</p>
</b>
<p>I've been debugging the old IQ suite lately. The following 10
positions needed
to be replaced. With the first nine lines, I've found alternate
solutions. So
the second solution just needs to be added. The 10th position had
missed the
"+" symbol in the solution. These changes have been incorporated into
the new
IQ.epd file.
</p>
</font><font face="Courier New">
<p>2rr2k1/pb3p1p/1pq3p1/4R1N1/2n5/P4P2/BP2Q1PP/4R2K w - - bm Nxf7 Re7;
id "IQ.932";<br>
2r1k1nr/3bbpp1/p2p2P1/4pP2/1pqNP3/2N1B3/PPP3Q1/1K1R2R1 w k - bm b3 Nd5;
id"IQ.964";<br>
1kqr2r1/ppp5/2nb1p2/1Q1N2pb/P2P4/1RN1P3/3B1PP1/5R1K b - - bm Be2 Rh8;
id"IQ.1011";<br>
5rk1/5pp1/3b4/1pp2qB1/4R2Q/1BPn4/1P3PPP/6K1 b - - bm Bf4 Ra8; id
"IQ.1091";<br>
5b2/pr4pk/4P1Rp/1pppBPP1/8/1P2P3/P6K/8 w - - bm Rxh6+ gxh6; id
"IQ.1123";<br>
2kr2r1/Qpq2p1p/1n2p3/2b2p2/8/2B2PP1/PPPN3P/R3K2R b - - bm Rxd2 Rxg3;
id"IQ.1204";<br>
r1b2k1r/1p4pp/p4B2/2bpN3/8/q2n4/P1P2PPP/1R1QR1K1 w - - bm Bxg7+ Qh5;
id"IQ.1244";<br>
r1n1nrk1/p4p1p/1q4pQ/2p1pN2/1pB1P1P1/5P2/PPP4P/1K1R3R w - - bm Rd6
Rhg1; id"IQ.1276";<br>
r3r1k1/bpp1q1pp/p3bp2/2p4Q/4N3/1P2PP2/PB3P1P/R2R3K w - - bm Nxf6+ Rg1;
id"IQ.1287";<br>
r4rk1/4ppbp/1q2bnp1/n1p4P/4P1P1/2NBBP2/PP1Q4/1K1R2NR b - - bm Bxa2+;
id"IQ.1290";</p>
</font><font face="Helvetica,Arial"></font>
<p><font face="Helvetica,Arial">(11-14-2002)
Four additional lines are corrected. Thanks to Uri, Andreas, and GCP.</font>
<font face="Courier New"><br>
4rk2/1p3r2/3q1nQp/1R1P2p1/P2pp3/3B2PP/1P3P2/2R3K1 w - - bm Qxh6+ Rxb7;
id "IQ.967";<br>
4rbk1/1q3ppp/2Rr4/1p1P1B2/2b1PR2/p5P1/5P1P/B1Q3K1 w - - bm Bxh7+ Rxd6
Rh4 Bxg7; id "IQ.973";<br>
r1b1k2r/p1p1nppp/2p5/3q4/8/1P4P1/P1P1QK1P/RNB1R3 b kq - am O-O; id
"IQ.1172";<br>
r6r/pb1R1pk1/1p2p1pp/3nP3/4N2Q/4B3/P3qPPP/3R2K1 w - - bm Bxh6+; id
"IQ.1267";</font></p>
<font face="Helvetica,Arial"></font>
<p><font face="Helvetica,Arial">(11-15-2002)
Two more corrections. Thanks Uri.
</font><font face="Courier New"><br>
2qrrb2/pb3ppk/1npp3p/5N2/1p2n3/1P3NPB/PBPQ1P1P/3RR1K1 w - - bm Rxe4
Qf4; id "IQ.928";<br>
4r2r/pp3k2/2p1pq2/3nR3/2PP1pp1/1B1Q2P1/PP3PK1/6R1 b - - bm Ne3+ Nb4; id
"IQ.977";</font></p>
<font face="Helvetica,Arial"></font>
<p><font face="Helvetica,Arial">(12-27-2002</font>
<font face="Courier New">)</font>
<font face="Helvetica,Arial">Seven more postions with corrected
solutions. Thanks to Dieter Buerssner and
Yace
</font><font face="Courier New"><br>
7r/8/3p1p1r/p1kP2p1/Pp2P1P1/1PpR3P/5R1K/8 b - - bm Re8; id "IQ.1121";<br>
8/r4p2/6p1/1pknP2p/2p1b3/P1P2N2/2BK2PP/R7 b - - bm Nxc3 Bxc2; id
"IQ.1150";<br>
2r5/1p6/pq2p2p/3rN3/k2P2Q1/3R2P1/1P3PP1/1K6 b - - bm Qxb2+ Qd6; id
"IQ.1157";<br>
3rr1k1/1p2bpp1/2ppq2p/p1n5/2P4P/1PN1P1P1/PBQR1PK1/2R5 b - - bm Bxh4
Bf6; id "IQ.1158";<br>
2r1r1k1/4qpb1/p2p2p1/1p1Pn1P1/3BB3/P1P5/1P4Q1/1K2R2R w - - bm Bxg6 Qh2
Qh3; id "IQ.1282";<br>
4rbk1/n2n3p/b1q1p1p1/1p1pP1B1/1PrP1N2/1R3NP1/3Q1PB1/R5K1 w - - bm Nxg6
Bf1; id "IQ.1285";<br>
r4rk1/4ppbp/1q2bnp1/n1p4P/4P1P1/2NBBP2/PP1Q4/1K1R2NR b - - bm Bxa2+
Rfb8; id "IQ.1290";</font></p>
<font face="Helvetica,Arial">
</font>
<p><font face="Helvetica,Arial">(12-27-2002) Note: IQ.1162 seems
suspect. The solution of 1. Bf4 tries to seal
the BQ on the kingside and then after 1... exf4, White achieves a draw
due to a
perpetual attack on it. But Black's 1... e4! seems to cross this plan
and Black
looks better.
</font></p>
<p>
<font face="Helvetica,Arial">(12/31/2002) Two suspect positions have
been removed. IQ.1162 and IQ.1167 were
broken by Miguel and Uri respectively. Thanks, guys. These positions
have been
replaced with IQ.894 and IQ.895. Total positions are still 360.<br>
</font><font face="Courier New">
r3rnk1/4qpp1/p5np/4pQ2/Pb2N3/1B5P/1P3PP1/R1BR2K1 w - - bm Bxh6; id
"IQ.894";<br>
r1br2k1/p1q2pp1/4p1np/2ppP2Q/2n5/2PB1N2/2P2PPP/R1B1R1K1 w - - bm Bxh6;
id "IQ.895";</font></p>
<font face="Helvetica,Arial">
</font>
<h4><font face="Helvetica,Arial">VI. Information and Improvements</font></h4>
<p>
<font face="Helvetica,Arial">If you run the test and would like to
share your results please send them along
and they will be included here. If you find any alternative solutions
or
questionable ones please send this data so the test can be improved.</font></p>
<p>
<font face="Helvetica,Arial">My thanks to the posters at CCC and the WB
forum for pointing out errors and
omissions.
</font></p>
<p><font face="Helvetica,Arial">Enjoy the test. </font></p>
<br>
<p><br>
</p>
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